Release 10.1A: OpenEdge Development:
ADM Reference

DataModified

Flag that indicates whether the current SCREEN-VALUES have been modified but not saved.

Data type: LOGICAL

Notes:

Read and Write.
The difference from getNewRow is that it also returns TRUE for saved and uncommitted new record and thus cannot be used to check the object’s state. This uses the RowMod field in the temp-table to see if the row is new (just as getNewRow) and in addition checks to see if the RowObjUpd is not available, which indicates that this has not been committed. Do some double checking if a rowObjUpd is available to ensure that this is the right one.